Protostars Are Difficult to Observe Because

question 35

Multiple Choice

Protostars are difficult to observe because

• A) the protostar stage is very short.
• B) they are surrounded by cocoons of gas and dust.
• C) they radiate mainly in the infrared.
• D) all of the above
• E) they are all so far away that the light hasn t reached us yet.

---

Definitions:

Infinite Slope

An idealized concept in mathematics and economics indicating a line that has an immeasurable steepness or an undefined gradient.

Negative Slope

Negative slope indicates a decrease in the variable on the y-axis as the variable on the x-axis increases, often seen in graphs representing inverse relationships.

Positive Slope

A line or curve on a graph that moves upwards from left to right, indicating a positive relationship between two variables.

Variable on the Vertical Axis

In a graph, the variable that is represented on the vertical (y) axis, which is typically the dependent variable in an analysis.